Mitchell Steiner
Analyst · the company's product portfolio, risks related to the ability of the company to obtain sufficient financing on acceptable terms when needed to fund development and company operations, risks related to competition, government contracting risks and other risks detailed in the company's press releases, shareholder communications and Securities and Exchange Commission filings.
For additional information regarding such risks, the company urges you to review its 10-Q and 10-K SEC filings. I would now like to turn the conference over to Dr. Mitchell Steiner, Veru Inc.'s Chairman, CEO and President. Please go ahead
Thank you, operator, and good morning. This is Dr. Mitchell Steiner, Chairman, President and CEO of Veru. And joining me are Michele Greco, Chief Financial Officer and Chief Administrative Officer; and Phil Greenberg, Executive Vice President, Legal.
Thank you for joining our call. Veru is a urology and oncology biopharmaceutical company focusing on prostate cancer and prostate cancer supportive care medicines. Today, we will update you on the clinical development of our drug pipeline and the commercialization of our products as well as provide financial highlights for the second fiscal quarter 2019.
Our strategy is to be the prostate cancer company. We're dedicated to the development and commercialization of products to address unmet medical needs for prostate cancer treatment and supportive care. The markets for prostate cancer treatment and prostate cancer supportive care are well established as multibillion-dollar markets. And given our core expertise and the number and type of drugs in our pipeline, we are uniquely positioned to understand, develop and commercialize medicines for these unmet medical needs of prostate cancer patients.
Here is a brief update on the advancement of the prostate cancer drug pipeline. We are enrolling an open-label Phase Ib/II clinical trial for VERU-111, a novel, proprietary, first-in-class, oral-selective antitubulin agent in metastatic castration-resistant prostate cancer patients that have also become resistant to novel androgen blocking agents, enzalutamide or abiraterone but prior to IV chemotherapy also referred to as a prechemotherapy state.
In other words, the open-label Phase II trial will target those patients whose prostate cancer has progressed but before they go on to IV taxane chemotherapy. This prechemotherapy space in men who have failed a novel androgen blocking agent is currently the fastest growing unmet medical need segment in advanced prostate cancer. In the Phase Ib study, we are determining the maximally tolerated dose, so we can then select a treatment dose that will be evaluated in the Phase II. We find the maximally tolerated dose by treating 3 patients with an oral daily dose of VERU-111 for 7 days followed by 2 weeks off drug, which represents 1 cycle.
We will treat for at least 3 cycles and for the patients that are responding to treatment, we'll continue this treatment until there is evidence of prostate cancer progression. This will allow us to assess the durability of the anticancer response. We are evaluating escalating doses and cohort to 3 patients with 4.5, 9, 18, 27, 36 and 45 milligrams doses of VERU-111.
We're also assessing at least 2 dosing schedules. At this time, we can comment on some promising early clinical observations. As for safety, VERU-111 appears to be well tolerated. No reported complaints of neurotoxicity and no evidence of neutropenia or liver enzyme changes. We are also encouraged as we are seeing in some men who's PSAs were rising prior to the enrollment into the Phase Ib PSA stabilizations and reductions, even at the lowest doses that being tested, which is a promising early indication of efficacy. We will continue to report safety and efficacy clinical data from the Phase Ib, which we expect to be completed by this summer. After we have selected a dose in the Phase Ib, we expect the Phase II study will commence by early fall. There are currently no FDA-approved drugs for this indication.
According to our [indiscernible], abiraterone and enzalutamide for advanced prostate cancer had over $6 billion in 2018 global annual revenue. Interestingly, in men with castration-resistant prostate cancer who take these drugs, 12% to 25% will continue to have cancer progression and 75% to 85% of men will have an initial tumor response and then have cancer progression within 9 to 15 months. Men who fail these novel androgen blocking agents is the population -- the exact population that VERU-111 is targeting, which we estimate represents a $4.5 billion annual global market.
Our next clinical product candidate is zuclomiphene, a novel, proprietary, oral, nonsteroidal, estrogen-receptor agonist being evaluated to treat hot flashes, the most common side effect in men on androgen deprivation therapy for advanced prostate cancer. We are enrolling approximately 100 men in a multicenter double-blind placebo dose-finding Phase II clinical study. Enrollment is progressing in approximately 17 clinical sites in United States, and we anticipate top line results this summer of 2019. Based on the current blinded, aggregate, preliminary clinical data from our placebo-controlled trial, we can make the following general clinical observations. Some men are experiencing reductions in hot flashes. And as for safety, zuclomiphene appears to be well tolerated.
Based on an independent market analysis sponsored by the company, which included interviews with payers covering 259 million U.S. lives, urologists and medical oncologist, the market research estimates that the U.S. potential sales for zuclomiphene citrate will be over $600 million annually with a 25% market penetration. This independently confirms that zuclomiphene for the indication of treatment of hot flashes to men on the androgen deprivation therapy for advanced prostate cancer is a major market opportunity. Currently, there are no FDA-approved drugs for this indication. We will continue to seek new drugs to add to our portfolio of products for prostate cancer treatment and prostate cancer supportive care.
Veru's ability to advance the clinical development of our proprietary prostate cancer drugs that address unmet medical needs in large markets is being substantially supported by investments from 2 commercial sources of revenue. As you can see from the earnings release, in Q2 fiscal year 2019, we have again experienced significant growth in revenues and gross profits from our commercial products, the FC2 female internal condom as well as PREBOOST now being marketed as Roman Swipes, which is a 4% benzocaine wipe for premature ejaculation.
In the commercial segment of our business, which is FC2 and the Roman Swipes and drug commercialization costs, our gross profit in Q2 fiscal year 2019 was $4.6 million compared to $1.2 million in Q2 fiscal year 2018, which is up 285%. In fact, gross profit for year-to-date 2019 in 2 quarters was $9.3 million compared to all of fiscal year 2018 of $8.8 million.
Because of this continued revenue growth and the use of other existing capital sources, we have been able to fund the development of our prostate cancer clinical programs and our urology specialty pharmaceuticals for the past 6 months with an approximate $3 million loss from operations.
Michele will cover these financial results highlights in a few moments. It's important to note we intend to continue this revenue growth trajectory as we have completed a successful bioavailability and bioequivalence clinical trial for the company's proprietary Tadalafil/finasteride combination tablet for the treatment of symptoms of BPH. As I mentioned before, we have trademarked the commercial name of TADFIN and have filed patent applications that have issued will have an expiry of 2040. We expect this to be the company's first pharmaceutical urology asset to move into commercialization. We are in the process of making FDA and commercial batches of the drug, and we plan to submit the new drug application later this year to early 2020 with an approval and launch expected in 2020.
We believe that TADFIN will be an attractive product for BPH. BPH treatments have an established multibillion-dollar global market. If approved, TADFIN will be the first commercially available combination of an erectile dysfunction and BPH medicine. Tadalafil, known as CIALIS and finasteride medicine that shrinks the process -- prostate, also known as Proscar.
In the U.S., we intend to launch TADFIN to telemedicine channels. We are also in discussions with potential commercial partners outside the U.S., having TADFIN revenues next calendar year from U.S. sales and potential partnerships with upfront payments and royalties from outside the U.S. should add substantial near-term revenues with high gross margins to the existing and growing revenues from FC2 and PREBOOST Roman Swipe products.
I will now turn the call over to Michele Greco, CFO, CAO, to discuss the financial highlights. Michele?